Hello, I want to extract points from line feature from shapefile. I have search for solutions, it shows that most of people use gis:vertex-lists-of to do this. However I got an error message below when I try to do that:
Extension exception: not a VectorFeature: org.myworldgis.netlogo.VectorDataset @ca24265 error while observer running GIS:VERTEX-LISTS-OF called by procedure DRAW-CITIES called by Button 'draw-cities' Code below: to draw-cities gis:set-drawing-color red gis:draw cities-dataset 1 foreach gis:vertex-lists-of cities-dataset [ a -> ] end cities-dataset is a points collection shapefile from Netlogo library ""GIS general examples" model I don't understand that even I put a points feature in the function, I just got an error. Do I misuse the function? How can I corectly use it? Thank you. -- You received this message because you are subscribed to the Google Groups "netlogo-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to netlogo-devel+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/netlogo-devel/a69394a1-c55a-4231-8ab1-322df1578e59n%40googlegroups.com.